Rockstar (a new publishing label under Take 2 Interactive) is bringing out the first-ever add-on disc for the PlayStation. Grand Theft Auto: Mission Pack #1. London 1969 is not only a mouthful of a title, but it's a set of new missions that makes fun of British TV and films of the 1960s and '70s. So how is an add-on disc for the PlayStation supposed to work, you ask? Upon loading of the Mission Pack, the game will prompt you to place the original Grand Theft Auto in your system. After it loads up the necessary game engine data, you replace the Mission Pack, which will then load up your new London-based stages. GTA: MP#1, L1969 should be out in stores this summer.